I've been compiling useful resources for parents and professionals treating eating disorders. I often recommend the reading below:

Eating Disorder Resources

Physical and Systemic Effects of Malnutrition

Behavioral Symptoms of Eating Disorders

Eating Disorder Presentation to Parent Group: Parents Make Recovery Possible [PDF]

American Academy of Pediatrics Identification and Management of Eating Disorders in Children and Adolescents [PDF]

Effects of Starvation – University of Minnesota Starvation Study [PDF]

Useful Links for Parents

Families Empowered and Supporting Treatment of Eating Disorders

Family-based treatment for adolescent eating disorders: A detailed discussion of the data

Eating Disorders 101, Dr. Walter Kaye, University of California San Diego (UCSD) Eating Disorder program

Maudsley Parents - Family-Based Treatment for eating disorders, anorexia nervosa, and bulimia nervosa

Science Daily - Current research comparing Family-Based Therapy to Individual Therapy